Disgust, Morality, and Human Identity: Heather Looy:

“Theologically, the Judeo-Christian tradition uses disgust and related concepts of abomination and impurity in conjunction with moral codes designed to preserve communal identity as the people of God. Psychosocial research reveals disgust as a universal emotion that enables evaluation and regulation of one class of moral behaviors, and serves to express and preserve cultural identity. Neurobiology is beginning to trace the neural circuitry involved in disgust and morality, suggesting emotions are the basis for moral judgement, and revealing intriguing relationships between disgust, morality, and other aspects of the psyche.” Metanexus